Who has been buying tess stock?

2 distinct insiders have filed 2 disclosed insider purchases in tess (095610), most recently on 2026-03-11. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does tess have?

tess has 2 buy-side and 6 sell-side disclosures on record, covering ₩13.8B ($9.6M) in total reported value, spanning 2024-04-11 to 2026-03-11.

Where does StockDrifts get tess insider data?

From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.

Do insider buys in Korean stocks predict returns?

Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

tess 095610

Company

테스tess

Insiders

Buys

Total Value

₩13.8B ($9.6M)

Avg Return

-12.78%

Last Filing

2026-03-11

tess (095610) has 2 disclosed insider purchases and 6 disclosed disposals on record, filed by 2 distinct insiders. Together those filings cover ₩13.8B ($9.6M) in reported transaction value. The earliest filing StockDrifts holds for tess is dated 2024-04-11; the most recent is 2026-03-11. All of it is parsed from DART D001/D002 insider disclosures, the official disclosure system operated by the Financial Supervisory Service (Korea). Across these filings the average return since disclosure is -12.78%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent insider trades

Date	Type	Source	Insider	Position	Shares	Price at filing	Return	Value
2026-03-11	BUY	Market Buy	국민연금공단 National Pension Service	-	4.3K	-	-	-
2026-03-11	SELL	Market Sell	국민연금공단 National Pension Service	-	-25.9K	-	-	-
2026-03-10	BUY	신규주요주주	국민연금공단 National Pension Service	-	45.7K	-	-	-
2026-03-10	BUY	신규보고	국민연금공단 National Pension Service	-	1.9M	-	-	-
2026-02-02	SELL	Market Sell	국민연금공단 National Pension Service	-	-73.7K	₩67,300	-3.3%	₩5.0B ($3.4M)
2026-02-02	BUY	Market Buy	국민연금공단 National Pension Service	-	23.5K	₩67,300	+3.3%	₩1.6B ($1.1M)
2026-01-30	BUY	신규보고	국민연금공단 National Pension Service	-	1.8M	₩72,200	-3.7%	₩131.0B ($90.9M)
2026-01-30	SELL	Market Sell	국민연금공단 National Pension Service	-	-31.1K	₩72,200	+3.7%	₩2.2B ($1.6M)
2026-01-30	BUY	신규주요주주	국민연금공단 National Pension Service	-	161.7K	₩72,200	-3.7%	₩11.7B ($8.1M)
2026-01-09	SELL	Market Sell	주재영 Jaeyoung Jaeyoung	Internal director (president)	-8.6K	₩52,300	-32.9%	₩451M ($313K)
2026-01-08	SELL	Market Sell	주재영 Jaeyoung Jaeyoung	Internal director (president)	-32.2K	₩54,500	-27.5%	₩1.8B ($1.2M)
2026-01-07	SELL	Market Sell	주재영 Jaeyoung Jaeyoung	Internal director (president)	-48.0K	₩57,900	-20.0%	₩2.8B ($1.9M)
2025-12-22	BUY	PROGRAM	이재호 Jaeho Lee	CEO and President	1.3K	₩40,550	+71.4%	₩53M ($37K)
2025-12-22	BUY	PROGRAM	정진옥 Jeong Jin-ok	Managing Director	1.0K	₩40,550	+71.4%	₩41M ($28K)
2025-12-22	BUY	PROGRAM	이유영 Lee Yu-young	Managing Director	1.0K	₩40,550	+71.4%	₩41M ($28K)
2025-12-22	BUY	PROGRAM	하현진 Ha Hyun-jin	Managing Director	1.0K	₩40,550	+71.4%	₩41M ($28K)
2025-12-22	BUY	PROGRAM	안병대 Byeongdae Ahn	vice president	1.1K	₩40,550	+71.4%	₩45M ($31K)
2025-12-22	BUY	PROGRAM	주숭일 Joo Seong-il	CEO Chairman	1.5K	₩40,550	+71.4%	₩61M ($42K)
2025-12-22	BUY	PROGRAM	주재영 Jaeyoung Jaeyoung	Executive Director (Vice President)	1.1K	₩40,550	+71.4%	₩45M ($31K)
2025-07-15	SELL	증여	하현진 Ha Hyun-jin	Managing Director	-11.0K	₩26,600	-161.3%	₩293M ($203K)
2024-04-11	SELL	증여	주숭일 Joo Seong-il	CEO Chairman	-250.0K	₩24,100	-188.4%	₩6.0B ($4.2M)
2024-04-11	BUY	수증	주재영 Jaeyoung Jaeyoung	Executive Director (Vice President)	250.0K	₩24,100	+188.4%	₩6.0B ($4.2M)

Frequently asked questions

Who has been buying tess stock?: 2 distinct insiders have filed 2 disclosed insider purchases in tess (095610), most recently on 2026-03-11. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does tess have?: tess has 2 buy-side and 6 sell-side disclosures on record, covering ₩13.8B ($9.6M) in total reported value, spanning 2024-04-11 to 2026-03-11.
Where does StockDrifts get tess insider data?: From DART D001/D002 insider disclosures — the official filing system run by the Financial Supervisory Service (Korea). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from DART.
Do insider buys in Korean stocks predict returns?: Not uniformly. StockDrifts analysed 170,720 share-count changes across 56,930 Korean DART filings using cross-sectional alpha at fixed forward horizons, and found returns concentrated in particular signal tiers rather than in insider buying generally.

Source filings

Every trade listed above is disclosed in DART D001/D002 insider disclosures, filed with the Financial Supervisory Service (Korea). View the original DART filings for tess. For how StockDrifts scores these disclosures, see the Korea insider signal tier research, or browse every Korean stock we track.